BMW 3 Series MOT pass rate and common problems

BMW 3 Series common problems: what should I check before buying?

The faults recorded most often at BMW 3 Series MOTs in 2019–2024, per 100 tests.

• Tyre tread below the legal limit4.29
  Dangerous

  What to check: Check the tread across every tyre with a gauge; wear on one edge points to a tracking fault.

• Worn suspension bush or joint3.81
  Major

  What to check: Listen for knocks over speed bumps, feel for the car wandering under braking, and ask which part was replaced.

• Windscreen or window damaged3.41
  Minor

  What to check: Look for chips and cracks across the windscreen: chips spread, and larger damage in front of the driver fails.

• Tyre badly cut or damaged3.16
  Major

  What to check: Check both sidewalls of every tyre, including the inner side, for cuts, bulges and tears.

• Shock absorber leaking or failed3.03
  Major

  What to check: Look behind the wheels for oily, wet shock absorbers, and push down hard on each corner: it should rise once and settle.

One test can record several defects, so this is not the share of BMW 3 Series models.

Each tip applies only if the car you are looking at has that fault in its own MOT history.

Which BMW 3 Series years should I avoid?

2020 is the BMW 3 Series year that fails its MOT most for its age; 2017 fails least.

Fails more for its age: 1999, 2000, 2001, 2004, 2012, 2019, 2020.

Fails less for its age: 2006, 2007, 2015, 2016, 2017, 2018.

Year means the year the car was first registered, as DVSA records it. It may differ from the year it was built.

How does the BMW 3 Series compare with similar cars?

3 of 8 similar models fail less often for their age than the BMW 3 Series.

This is a different comparison from the one at the top. There, the BMW 3 Series is measured against all cars of the same age. Here, it sits among similar models. Both can be true.

How do BMW 3 Series models hold up as they get older?

First-time MOT failures on BMW 3 Series models go from 14.6% at age 3 to 35.0% at age 19.

Download every age and sample size (CSV)

Do advisories on BMW 3 Series models turn into fails at the next MOT?

23.3% of lights and electrical advisories on BMW 3 Series models turned into lights and electrical fails at the next MOT.

The next MOT came about 12 months later.

Based on 21,009 advisories, each followed to the car's next MOT, 2019–2024. This counts advisories, not cars.

The most common advisories on BMW 3 Series models are for brakes: 40.49 per 100 tests.

Download all advisory transitions (CSV)

BMW 3 Series common problems: what actually fails the MOT?

BMW 3 Series MOTs fail most often on brakes: 12.8 per 100 tests, against 13.4 for UK cars of the same age (2019–2024, n = 3,110,401).

Full CSV

What is likely to fail next on a used BMW 3 Series?

For BMW 3 Series models aged 3 to 5 whose last MOT was a pass, the item most likely to fail at the next MOT is tyres: 5.5% failed on it (2019–2024, n = 273,587).

Full CSV

How often do BMW 3 Series models get a dangerous MOT defect?

The BMW 3 Series gets a dangerous defect more often than the UK average: 12.7 per 100 first tests against 11.2 across the UK. A dangerous defect means the vehicle should not be driven away until it is fixed. In the same tests, 42.2 major and 10.3 minor defects were recorded per 100 tests (one test can record several).

Severity was not recorded for some 2018–2021 tests.

Comparison: 11.2 per 100.

Full CSV

How much do BMW 3 Series MOT repairs cost?

Expected repair cost per BMW 3 Series MOT: about £75 (up to about £142 if more expensive parts are needed), from the chance of failing each item and its most common UK repair price (catalogue estimate, n = 498,596).

Computed, not measured.

Full CSV

What mileage is normal for a used BMW 3 Series?

At age 8, the median BMW 3 Series had covered 75,601 miles by its MOT; the middle half ranged from 58,103 to 97,011 miles (2024, n = 31,764).

Full CSV

Do high-mileage BMW 3 Series models fail their MOT more often?

At ages 10–14, 13.2% of BMW 3 Series models with under 40,000 miles failed first time, against 34.3% of those with over 140,000 miles (2024, n = 37,173). Inside this age group, higher mileage goes with more failures.

Full CSV

How many miles do BMW 3 Series models last?

41.9% of BMW 3 Series models tested had reached 100,000 miles, and 12.3% had reached 150,000 (2024, n = 1,297,300).

Full CSV

Does mileage, as well as age, change the BMW 3 Series failure index?

Matched on annual mileage as well as age, the BMW 3 Series index is 76.5, against 81.9 on age alone (2019–2024, n = 498,596).

Comparison: 81.9 index.

Full CSV

Which BMW 3 Series fuel type fails its MOT less?

There is no real difference between diesel and petrol BMW 3 Series models before allowing for age: 25.9% against 25.7% fail first time.

Comparison: other fuels.

Full CSV

Which BMW 3 Series engine fails its MOT least?

Among engines with enough tests, the best BMW 3 Series engine is the diesel over 2.0 litre at index 86.5, and the worst the diesel 1.8–2.0 litre at 106.8, where 100 = the model's own average (2024, n = 498,596).

Comparison: 100 = model average.

Full CSV

Where in Britain does the BMW 3 Series fail its MOT most?

BMW 3 Series fails first-time MOTs most in Torquay (TQ): 35.5% against 26.3% across Britain for this model, both 2019–2024 (2019–2024, n = 14,095).

Across Britain for this model: 26.3% failed first time, also in 2019–2024.

See every postcode area and its sample size

Does the BMW 3 Series have rust problems?

Allowing for age, BMW 3 Series MOTs record corrosion failures at 0.7 times the national rate: 0.52% of tests against 0.77% (2024 + geographic layers, n = 484,886).

Computed, not measured.

Comparison: 1 ratio estimate.

Full CSV

What do six years of MOTs show about owning a used BMW 3 Series?

Of failed BMW 3 Series MOTs, 36.0% were retested the same day and a further 60.0% within 10 days; the median failed car passed its retest after 1 day (2019–2024, n = 584,898).

Full CSV

Is low mileage good for a used BMW 3 Series?

BMW 3 Series models aged 5 to 14 doing under 5,000 miles a year failed first time in 14.8% of tests, against 26.6% for those doing 8,000 to 12,000 miles (2019–2024, n = 155,902).

Full CSV

How many years do BMW 3 Series models last?

BMW 3 Series models tend to last: at ten years old the typical one has about 7.6 more years of MOTs ahead, more than the median model. This is a forecast from the survival curve and may not come true.

Computed, not measured.

Forecast, not a prediction for a particular car.

Full CSV

How many BMW 3 Series models are still on the road as they age?

In 2024, for every 100 BMW 3 Series models tested at ages 4 to 6, about 38 were tested at age 19 (2024, n = 69,533).

Full CSV

If a used BMW 3 Series fails its MOT, will it fail the next one?

31.7% of BMW 3 Series models that failed an MOT failed the next one too, against 22.1% after a pass (2019–2024, n = 164,470). The failure most likely to come back is ‘lamps, reflectors and electrical equipment’: 32.8% of those fails recurred at the next MOT.

Comparison: 22.1 %.

Full CSV

Which BMW 3 Series faults tend to come together?

On BMW 3 Series models, seat belts and supplementary restraint systems and speedometer and speed limiter failures turn up together 12.0 times as often as chance would predict (2024, n = 21).

Comparison: expected joint rate.

Full CSV

BMW 3 Series safety recalls: how do I check this car?

DVSA lists 121 safety recall campaigns matched to the BMW 3 Series; check whether yours has been fixed, using its registration number.

Computed, not measured.

Recall effects are computed comparisons, not causal findings; campaigns are not linked to individual VINs.

Check outstanding safety recalls by registration

Full CSV

How many BMW 3 Series models fail the MOT at each age?

Of every 100 BMW 3 Series models tested at age 5, about 13 failed the MOT first time; at age 10, about 23. These are one-year rates for different cars tested in the same year, not a fleet followed over time; the steepest one-year step in this cross-section is between cars aged 11 and 12, 4.59 percentage points (2024).

Full CSV

What have US dealers been told about the BMW 3 Series?

NHTSA lists 840 US technical service bulletins for the BMW 3 Series (US market, BMW 3 SERIES and its variants, model years 2015–2022 only); a count, not a UK failure rate.

Comparison: NHTSA.

NHTSA, US market, BMW 3 SERIES and its variants, model years 2015–2022 only; covers 211 of 761 models. These two sections use US records from NHTSA. US cars sold under the same name can differ from UK ones.

Full CSV

What do US owners complain about on the BMW 3 Series?

The most common US owner complaint about the BMW 3 Series to NHTSA concerns engine (not MOT-tested): 131 complaints (US market, BMW 3 SERIES and its variants, model years 2015–2022 only).

NHTSA, US market, BMW 3 SERIES and its variants, model years 2015–2022 only; covers 211 of 761 models. These two sections use US records from NHTSA. US cars sold under the same name can differ from UK ones.

Full CSV

Do BMW 3 Series models fail their MOT more in some months?

BMW 3 Series models fail first time most in January (27.8%, against 31.1% for all cars that month) and least in September (25.1%) (2024, n = 498,596).

Full CSV

How far is real-world MPG from the lab figure for BMW cars?

Real-world fuel use of 2021 diesel cars from BMW AG is 21.5% above the official WLTP figure: 6.77 against 5.57 litres per 100 km (2021+ cohorts, n = 144,060 vehicles).

Computed, not measured.

Plug-in hybrids: the lab figure assumes the battery is charged often; on the road many are driven mostly on petrol, so the gap is several times larger.

Comparison: 0% gap.

European Commission OBFCM; covers 19 of 761 models.

Full CSV

More on the BMW 3 Series

Overview:

Model overview · All BMW models

Build years:

1998 · 1999 · 2000 · 2001 · 2002 · 2003 · 2004 · 2005 · 2006 · 2007 · 2008 · 2009 · 2010 · 2011 · 2012 · 2013 · 2014 · 2015 · 2016 · 2017 · 2018 · 2019 · 2020

What fails:

body · brakes · plates · lights · emissions · wheels · seat belts · steering · suspension · tyres · visibility

Abroad:

Finland · the Netherlands · Norway

By area:

Postcode areas

Compare:

Audi A3 · Mercedes-Benz C-Class · Audi A4